Unexplicably

adv

Definitions

Adverb
  1. 1
    Uncommon form of inexplicably. form-of, uncommon

    "[S]urely every encouragement ought to be given, and will be given to those professional men, or to any man who proves successful in throwing any light on this hitherto unexplicably dark and mysterious subject."

Etymology

From unexplicable + -ly.

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